{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:SBPXNPLO7Y5R3IRGDUBPYIPILG","short_pith_number":"pith:SBPXNPLO","canonical_record":{"source":{"id":"1912.02806","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-12-05T18:54:16Z","cross_cats_sorted":["astro-ph.EP"],"title_canon_sha256":"16a817c38e65ce6a0772f00d9d1d1b9e34f8e9123cdfa6d9611d19cfa742c406","abstract_canon_sha256":"075dd0abc28702f24b2d22e6edd5f2d94fd52b55b64d31fc396117e7124d480d"},"schema_version":"1.0"},"canonical_sha256":"905f76bd6efe3b1da2261d02fc21e8598b9496a120531cc33dc225b75dbb3ca2","source":{"kind":"arxiv","id":"1912.02806","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1912.02806","created_at":"2026-07-05T00:31:35Z"},{"alias_kind":"arxiv_version","alias_value":"1912.02806v1","created_at":"2026-07-05T00:31:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1912.02806","created_at":"2026-07-05T00:31:35Z"},{"alias_kind":"pith_short_12","alias_value":"SBPXNPLO7Y5R","created_at":"2026-07-05T00:31:35Z"},{"alias_kind":"pith_short_16","alias_value":"SBPXNPLO7Y5R3IRG","created_at":"2026-07-05T00:31:35Z"},{"alias_kind":"pith_short_8","alias_value":"SBPXNPLO","created_at":"2026-07-05T00:31:35Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:SBPXNPLO7Y5R3IRGDUBPYIPILG","target":"record","payload":{"canonical_record":{"source":{"id":"1912.02806","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-12-05T18:54:16Z","cross_cats_sorted":["astro-ph.EP"],"title_canon_sha256":"16a817c38e65ce6a0772f00d9d1d1b9e34f8e9123cdfa6d9611d19cfa742c406","abstract_canon_sha256":"075dd0abc28702f24b2d22e6edd5f2d94fd52b55b64d31fc396117e7124d480d"},"schema_version":"1.0"},"canonical_sha256":"905f76bd6efe3b1da2261d02fc21e8598b9496a120531cc33dc225b75dbb3ca2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:31:35.454039Z","signature_b64":"DFes4CH4hgxNngMBJB+6iHZG7th2zzLt2poOFAF4QVlqexQ5YaKUV7let258J/LOouo2ZIWAjcfnu5aLogOPAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"905f76bd6efe3b1da2261d02fc21e8598b9496a120531cc33dc225b75dbb3ca2","last_reissued_at":"2026-07-05T00:31:35.453592Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:31:35.453592Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1912.02806","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T00:31:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZtVZgFr1fbRHju6npHwwmy6OWTCzQ/Wsj5PZWJfCO2zonjhaK3BGYZSnUdw+UPJy0uw7jqNbCyGabb4pY7QICg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T15:08:40.009171Z"},"content_sha256":"a11d9e38ba50e79790094da8f461499d5157f84ec999487387c6236d3600fbb3","schema_version":"1.0","event_id":"sha256:a11d9e38ba50e79790094da8f461499d5157f84ec999487387c6236d3600fbb3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:SBPXNPLO7Y5R3IRGDUBPYIPILG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Spectral library of age-benchmark low-mass stars and brown dwarfs","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.EP"],"primary_cat":"astro-ph.SR","authors_text":"E. Manjavacas, M. Bonnefoy, M. R. Zapatero-Osorio, N. Lodieu, S.Boudreault, V. J. S. B\\'ejar","submitted_at":"2019-12-05T18:54:16Z","abstract_excerpt":"In the past years, some extremely red brown dwarfs were found. They were believed to have low surface gravity, but many of their spectral characteristics were similar to those of high surface gravity brown dwarfs, showing that youth (or low surface gravity) spectral characteristics are poorly understood. We aim to test surface gravity indicators in late-M and early-L brown dwarf spectra using data obtained with the X-shooter spectrograph at the Very Large Telescope. We selected a benchmark sample of brown dwarfs members of Chamaeleon\\,I ($\\sim$2 Myr), Upper Scorpius (5$-$10~Myr), Pleiades (132"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1912.02806","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1912.02806/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T00:31:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EQJQgJVEtfdmZlxyDfRw5jQuuIjtEL7vnTwJd9NJ8U4apxVnkC9DN07VGS22ZMJ2/2LnyW6qPJkgWD+tnOpaAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T15:08:40.009563Z"},"content_sha256":"e26875b604acdabc92b96e6059214d198c98f74d94707d77fbdc5013b89774be","schema_version":"1.0","event_id":"sha256:e26875b604acdabc92b96e6059214d198c98f74d94707d77fbdc5013b89774be"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SBPXNPLO7Y5R3IRGDUBPYIPILG/bundle.json","state_url":"https://pith.science/pith/SBPXNPLO7Y5R3IRGDUBPYIPILG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SBPXNPLO7Y5R3IRGDUBPYIPILG/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-07-06T15:08:40Z","links":{"resolver":"https://pith.science/pith/SBPXNPLO7Y5R3IRGDUBPYIPILG","bundle":"https://pith.science/pith/SBPXNPLO7Y5R3IRGDUBPYIPILG/bundle.json","state":"https://pith.science/pith/SBPXNPLO7Y5R3IRGDUBPYIPILG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SBPXNPLO7Y5R3IRGDUBPYIPILG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:SBPXNPLO7Y5R3IRGDUBPYIPILG","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"075dd0abc28702f24b2d22e6edd5f2d94fd52b55b64d31fc396117e7124d480d","cross_cats_sorted":["astro-ph.EP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-12-05T18:54:16Z","title_canon_sha256":"16a817c38e65ce6a0772f00d9d1d1b9e34f8e9123cdfa6d9611d19cfa742c406"},"schema_version":"1.0","source":{"id":"1912.02806","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1912.02806","created_at":"2026-07-05T00:31:35Z"},{"alias_kind":"arxiv_version","alias_value":"1912.02806v1","created_at":"2026-07-05T00:31:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1912.02806","created_at":"2026-07-05T00:31:35Z"},{"alias_kind":"pith_short_12","alias_value":"SBPXNPLO7Y5R","created_at":"2026-07-05T00:31:35Z"},{"alias_kind":"pith_short_16","alias_value":"SBPXNPLO7Y5R3IRG","created_at":"2026-07-05T00:31:35Z"},{"alias_kind":"pith_short_8","alias_value":"SBPXNPLO","created_at":"2026-07-05T00:31:35Z"}],"graph_snapshots":[{"event_id":"sha256:e26875b604acdabc92b96e6059214d198c98f74d94707d77fbdc5013b89774be","target":"graph","created_at":"2026-07-05T00:31:35Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/1912.02806/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"In the past years, some extremely red brown dwarfs were found. They were believed to have low surface gravity, but many of their spectral characteristics were similar to those of high surface gravity brown dwarfs, showing that youth (or low surface gravity) spectral characteristics are poorly understood. We aim to test surface gravity indicators in late-M and early-L brown dwarf spectra using data obtained with the X-shooter spectrograph at the Very Large Telescope. We selected a benchmark sample of brown dwarfs members of Chamaeleon\\,I ($\\sim$2 Myr), Upper Scorpius (5$-$10~Myr), Pleiades (132","authors_text":"E. Manjavacas, M. Bonnefoy, M. R. Zapatero-Osorio, N. Lodieu, S.Boudreault, V. J. S. B\\'ejar","cross_cats":["astro-ph.EP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-12-05T18:54:16Z","title":"Spectral library of age-benchmark low-mass stars and brown dwarfs"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1912.02806","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:a11d9e38ba50e79790094da8f461499d5157f84ec999487387c6236d3600fbb3","target":"record","created_at":"2026-07-05T00:31:35Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"075dd0abc28702f24b2d22e6edd5f2d94fd52b55b64d31fc396117e7124d480d","cross_cats_sorted":["astro-ph.EP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-12-05T18:54:16Z","title_canon_sha256":"16a817c38e65ce6a0772f00d9d1d1b9e34f8e9123cdfa6d9611d19cfa742c406"},"schema_version":"1.0","source":{"id":"1912.02806","kind":"arxiv","version":1}},"canonical_sha256":"905f76bd6efe3b1da2261d02fc21e8598b9496a120531cc33dc225b75dbb3ca2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"905f76bd6efe3b1da2261d02fc21e8598b9496a120531cc33dc225b75dbb3ca2","first_computed_at":"2026-07-05T00:31:35.453592Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:31:35.453592Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"DFes4CH4hgxNngMBJB+6iHZG7th2zzLt2poOFAF4QVlqexQ5YaKUV7let258J/LOouo2ZIWAjcfnu5aLogOPAQ==","signature_status":"signed_v1","signed_at":"2026-07-05T00:31:35.454039Z","signed_message":"canonical_sha256_bytes"},"source_id":"1912.02806","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a11d9e38ba50e79790094da8f461499d5157f84ec999487387c6236d3600fbb3","sha256:e26875b604acdabc92b96e6059214d198c98f74d94707d77fbdc5013b89774be"],"state_sha256":"df7f4abf9bfa89314c322d88d99cca3be5d3979f1aa612574d84591d5b2874c0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SpaFyAnwq6pDK5YtTKJSrfxwcbCrYhweRh8OFpW6DGhXPxUzmntM/BLTtUhrSSLzrtJulhX18ZLhqmX9YxJXBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-06T15:08:40.011470Z","bundle_sha256":"b36ff167fb19f68f7cd2d1b197b37ec0eaeda6203fef6752cc9962b3d0f45143"}}